style: Increased append readability #3021

Job	Run time
build (1.20.x, GOARCH=amd64 GOOS=linux, gno)	21s
build (1.20.x, GOARCH=wasm GOOS=js, gno)	31s
build (1.21.x, GOARCH=amd64 GOOS=linux, gno)	19s
build (1.21.x, GOARCH=wasm GOOS=js, gno)	25s
test (1.20.x, _test.cmd)	59s
test (1.20.x, _test.pkg)	34s
test (1.20.x, _test.gnolang.native)	22s
test (1.20.x, _test.gnolang.stdlibs)	49s
test (1.20.x, _test.gnolang.realm)	39s
test (1.20.x, _test.gnolang.pkg0)	1m 36s
test (1.20.x, _test.gnolang.pkg1)	6m 37s
test (1.20.x, _test.gnolang.pkg2)	4m 13s
test (1.20.x, _test.gnolang.other)	18s
test (1.21.x, _test.cmd)	1m 0s
test (1.21.x, _test.pkg)	32s
test (1.21.x, _test.gnolang.native)	20s
test (1.21.x, _test.gnolang.stdlibs)	47s
test (1.21.x, _test.gnolang.realm)	29s
test (1.21.x, _test.gnolang.pkg0)	1m 35s
test (1.21.x, _test.gnolang.pkg1)	6m 13s
test (1.21.x, _test.gnolang.pkg2)	3m 56s
test (1.21.x, _test.gnolang.other)	17s
upload-coverage	12s
	33m 4s

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